msvcrt: Don't forward towupper and towlower to ntdll.

dlls/msvcrt/msvcrt.spec

@@ -1453,8 +1453,8 @@
 # stub tmpnam_s(ptr long)
 @ cdecl tolower(long) MSVCRT_tolower
 @ cdecl toupper(long) MSVCRT_toupper
-@ cdecl towlower(long) ntdll.towlower
-@ cdecl towupper(long) ntdll.towupper
+@ cdecl towlower(long) MSVCRT_towlower
+@ cdecl towupper(long) MSVCRT_towupper
 @ cdecl ungetc(long ptr) MSVCRT_ungetc
 @ cdecl ungetwc(long ptr) MSVCRT_ungetwc
 # stub utime

dlls/msvcrt/wcs.c

@@ -1592,9 +1592,25 @@ int CDECL MSVCRT__towupper_l(MSVCRT_wint_t c, MSVCRT__locale_t locale)
 }
 
 /*********************************************************************
+ *              towupper (MSVCRT.@)
+ */
+int CDECL MSVCRT_towupper(MSVCRT_wint_t c)
+{
+    return MSVCRT__towupper_l(c, NULL);
+}
+
+/*********************************************************************
  *              _towlower_l (MSVCRT.@)
  */
 int CDECL MSVCRT__towlower_l(MSVCRT_wint_t c, MSVCRT__locale_t locale)
 {
     return tolowerW(c);
 }
+
+/*********************************************************************
+ *              towlower (MSVCRT.@)
+ */
+int CDECL MSVCRT_towlower(MSVCRT_wint_t c)
+{
+    return MSVCRT__towlower_l(c, NULL);
+}